[R] Rcommander and simple chisquare

[Christian Jost]

Dear John and Philippe,

thanks for your replys, I finally  found this 
menu, but I am somewhat at a loss how I should 
enter the observed frequencies. To take my 
example below, If I enter a one-column data.frame 
with the numbers 61 and 39, John's indicated menu 
is not highlighted. If I add a second column 
containing some factor, the menu is highlighted 
by I cannot select the first column. However, if 
I edit the data and declare the first column to 
be of type 'character' I can select it in the 
menu dialog and declare the expected frequencies, 
but the chisquare output doesn't make any sense. 
For the moment I cannot make any sense of that 
:-( Any help most appreciated, or a link to the 
tutorial/faq that explains such kind of problems.

Thanks, Christian.

At 11:31 -0400 15/09/05, John Fox wrote:
>Dear Philippe,
>
>This does a chi-square test of independence in a contingency table, not a
>chi-square goodness-of-fit test (which is done in the Rcmdr via Statistics
>-> Summaries -> Frequency distribution).
>
>Regards,
>  John
>
>--------------------------------
>John Fox
>Department of Sociology
>McMaster University
>Hamilton, Ontario
>Canada L8S 4M4
>905-525-9140x23604
>http://socserv.mcmaster.ca/jfox
>--------------------------------
>
>>  -----Original Message-----
>>  From: r-help-bounces at stat.math.ethz.ch
>>  [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
>>  Philippe Grosjean
>>  Sent: Thursday, September 15, 2005 7:32 AM
>>  To: Christian Jost
>>  Cc: r-help at stat.math.ethz.ch
>>  Subject: Re: [R] Rcommander and simple chisquare
>>
>>  Hello,
>>
>>  Just look at Statistics -> Contingency tables. There is an
>>  option for making the chi square test there.
>>  Best,
>>
>>  Philippe Grosjean,
>>
>>  ..............................................<°}))><........
>>    ) ) ) ) )
>  > ( ( ( ( (    Prof. Philippe Grosjean
>  > ..............................................................
>>
>>  Christian Jost wrote:
>>  > In this years biostat teaching I will include Rcommander (it indeed
>>  > simplifies syntax problems that makes students frequently miss the
>>  > core statistical problems). But I could not find how to
>>  make a simple
>>  > chisquare comparison between observed frequencies and expected
>>  > frequencies (eg in genetics where you expect phenotypic frequencies
>>  > corresponding to 3:1 in standard dominant/recessif
>>  alleles). Any idea
>>  > where this feature might be hidden? Or could it be added to
>>  > Rcommander?
>>  >
>>  > Thanks, Christian.
>>  >
>>  > ps: in case I am not making myself clear, can Rcommander be made to
>>  > perform
>>  >
>>  >> chisq.test(c(61,39),p=c(0.75,0.25))
>>  >
>>  >
>  > > ______________________________________________